Waterproofing in Philadelphia: what to know
Philadelphia has cold winters with occasional snow and hot, humid summers. Rowhomes are everywhere, many over 100 years old, with shared walls, flat roofs and older plumbing and electrical systems.
- Snowmelt and spring thaws push water into basements through cracks and wall joints.
- Older stone and block foundations often need interior drainage and a sump pump to stay dry.
- Spring storms and poor grading are the main causes of wet basements and crawl spaces.
How much does waterproofing cost?
- Basement waterproofing: $2,950 – $9,750
- Sump pump installation: $780 – $1,950
- Sump pump repair: $150 – $490
Estimate only. Typical price ranges based on public US cost data, adjusted by state. Your actual quote comes directly from the pro and depends on your home and the job.
Get a quote from a local pro →How it works
Where is water entering, when does it happen, and has the area been repaired before? Describe the problem, add your ZIP code and when you need help, and we look for an available local professional in the Philadelphia area. The request takes about 2 minutes, is free, and your address stays private until a professional is assigned.
Frequently asked questions
Do I need a permit for waterproofing work in Philadelphia?
Interior sealing usually does not need a permit, but excavation, new drains or sump pump discharge lines may. In Philadelphia, permits are typically handled by the Philadelphia Department of Licenses and Inspections (L&I). Rules change, so confirm with them before work starts.
Which parts of Philadelphia do you cover?
Requests are accepted from anywhere in the Philadelphia area, including Center City, Fishtown, South Philly, Northeast Philadelphia and Manayunk. Availability depends on local professionals in your ZIP code.
How much does waterproofing cost in Philadelphia?
Typical price ranges for Pennsylvania are shown in the cost estimate above. The final price depends on the job, materials and access, and the professional gives you a quote before any work begins. Sending a request is free.